untreated

adjective

un·​treat·​ed ˌən-ˈtrē-təd 

: not treated

untreated wastewater

especially : not improved or controlled medically

an untreated case of pneumonia

untreated diabetic patients

Synonyms of untreated

• crude
• unprocessed
• natural
• raw
• native

Examples of untreated in a Sentence

untreated wool

Recent Examples on the Web

The findings suggest perimenopause is not just misunderstood but also arriving earlier and going untreated for years. — Hanna Wickes, Fort Worth Star-Telegram, 25 July 2026

An infection that was left untreated was excruciating and fatal. — Gideon Lewis-Kraus, New Yorker, 25 July 2026

Namami Gange has added substantial sewage-treatment capacity and supported riverfront, afforestation, and biodiversity projects, but untreated sewage and industrial waste continue to affect the Ganges and its tributaries. — Aman Kumar, Encyclopedia Britannica, 24 July 2026

Thirteen of the 14 dogs seized by the Newport Beach Beach Animal Control were puppies, including two 6-week-old golden retriever puppies that were in critical condition because of untreated parasites. — Seamus Bozeman follow, Los Angeles Times, 24 July 2026

Word History

First Known Use

15th century, in the meaning defined above

Rhymes for untreated

• accreted
• competed
• completed
• conceited
• concreted
• defeated
• deleted
• depleted
• entreated
• intreated
• maltreated
• mistreated

Medical Definition

untreated

adjective

un·​treat·​ed -ˈtrēt-əd 

: not subjected to treatment

an untreated disease